Countermeasure

The heater flap lever easily returns to inhibited position, though additional tightening were performed few days ago, finding out the breakage of engineering plastic spacer to keep the lever rotational resistance.
I must hold the heater lever connected with heater exchanger flap must be kept in the opened position manually in these cold weather.
I'm going to make the alternative with some engineering plastic material with a physical property of viscoelasticity, how about polyacetal Resin material plate?

The ignition timing set now is too early, BTDC 8 degree. The special distributor equipped in my '71 VW 1302 Super Beetle has two vacuum diaphragms, one is for ordinal advancing and another is for retarding intending emission gas control. There must be some confusions in vacuum advancing mechanism in combination with retarding system. So just killing retarding and applying BTDC 7,5 degree ignition timing may cause too early ignitions especially in acceleration phase, because the value BTDC 7,5 degree is only for the distributor with single diaphragm(advancing only).
Deeper investigation and actual experiments are necessary for sampling on this point for the modifications applied now are all reversible.

The mission for overheating phenomena must be performed on coming Thursday, also noise from the rear seat back modified because of Air-conditioner burdening.